Since none of the major airlines
finalized the deal to buy the Indigo-S series airplanes, the investors, who had hoped to see such a deal, pushed Indigo's shares down 56 rupees to Rs. 933 in midday on the Bombay Stock Exchange.
Meaning: Because none of the major airlines finalised the deal to buy the Indigo-S series airplanes, investors, who had hoped to see such deal did something...
Note that "since" here is used as "because" . Use of since here is not a time marker.
Now the original sentence "pushed" is in the past tense and the action "had hoped" correctly captures the prior event. Thus, the use of "had" is correct.
(A) finalized the deal to buy Indigo-S series airplanes, the investors, who had hoped to see such a deal,
correct(B) has finalized the deal buy Indigo-S series airplanes, the investors, who have hoped to see such a deal,
incorrect use of "has" and "have hoped"(C) have finalized the deal to buy Indigo-S series airplanes, the investors, who hoped to see such a deal, had
incorrect use of "have" (D) finalized the deal to buy Indigo-S series airplanes, the investors, who hoped to see such a deal, have
here the sequence of "hoped" is not set right. Moreover, "have pushed" changes the tense of the original sentence(E) had finalized the deal to buy Indigo-S series airplanes, the investors, who hoped to see such a deal,
had finalised is not the prior event.Use of "had" is incorrectDarkHorse2019 It seems that in option B "to" is missing "deal
to buy"