Hi sujit2k,
This is in response to your PM.
Well, there are many official questions in which the noun modifiers do not follow "touch" rule. Here are a few examples:
1. Although she had been known as an effective legislator first in the Texas Senate and later in the United States House of Representatives, Barbara Jordan did not become a nationally recognized figure until 1974, when she participated in the
hearings on the impeachment of President Richard Nixon,
which were televised nationwide.
2. What scientists know about dinosaur brains comes from studies of the cranium,
the bony house of the brain
located in the back of the skull.
3. Emily Dickinson’s
letters to Susan Huntington Dickinson,
which were written over a period beginning a few years before Susan’s marriage to Emily’s brother and ending shortly before Emily’s death in 1886, outnumber her letters to anyone else.
Now let's look at Choice B of this question at hand:
B. to be the smallest network digital camcorder in the world, which is as long as a handheld computer, weighing: In my opinion, there is no issue with the reference of "which" because logically it should refer to "the smallest network digital camcorder". But yes, this choice is incorrect for the use of "to be".
Hope this helps.
Thanks.
Shraddha