Fusion, the process through which the sun produces heat and light, has

Won't the comma without a conjunction makes this a run on sentences?

As we have two independent clauses in this sentence.



Please clarify on this.

Ajit: even A uses ‘which’. Once you know why something is wrong, why do you wan to look beyond that and unnecessarily waste your valuable time in the test?

In rare cases, yes.

It will help you if you know the difference between the two and when to use which. The wrong usage may sometimes alter the meaning as well.

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Fusion, the process through which the sun produces heat and light, has been studied by scientists,some of whom have attempted to mimic the process in their laboratories by blasting a container of liquid solvent with strong ultrasonic vibrations.

A. Fusion, the process through which the sun produces heat and light, has been studied by scientists,

B. Fusion, the heat and light produced by the sun, has been studied by scientists,

C. Fusion, the process through which heat and light are produced by the sun, has been studied by scientists,

D. Scientists have studied fusion, the process the sun uses to produce heat and light,

E. Scientists have studied fusion, the process the sun uses to produce heat and light, and

Fusion, the process through which the sun produces heat and light, has been studied by scientists,some of whom have attempted to mimic the process in their laboratories by blasting a container of liquid solvent with strong ultrasonic vibrations.

A. Fusion, the process through which the sun produces heat and light, has been studied by scientists,

B. Fusion, the heat and light produced by the sun, has been studied by scientists,

C. Fusion, the process through which heat and light are produced by the sun, has been studied by scientists,

D. Scientists have studied fusion, the process the sun uses to produce heat and light,

E. Scientists have studied fusion, the process the sun uses to produce heat and light, and

Fusion, the process through which heat and light are produced by the sun, has been studied by scientists, some of whom have attempted to mimic the process in their laboratories by blasting a container of liquid solvent with strong ultrasonic vibrations.

(A) Fusion, the process through which heat and light are produced by the sun, has been studied by scientists,
(B) Fusion, the process through which the sun produces heat and light, which has been studied by scientists,
(C) Scientists have studied fusion, the process the sun uses to produce heat and light, and
(D) Scientists have studied fusion, the process the sun uses to produce heat and light,
(E) The study of fusion, the process through which the sun produces heat and light, by scientists,

Note : Manhattan Prep changed the question.

I do not agree with the OA marked. It is clearly A.