Institution: Bangladesh Bank Exam: Senior Officer (IT) - Sonali,Janata,BD Krishi,BD Development Bank Ltd - 30.11.2018 ||
Topic: English literature, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The correct answer is A) "for, of" because of the specific usage of prepositions in English.

In the first part of the sentence, "He has no good cause __ complaint," the preposition "for" is commonly used to indicate a reason or justification. The phrase “good cause for complaint” is a well-established expression meaning there is no valid reason to complain. The preposition "for" appropriately links the concept of "good cause" with the action of "complaint."

In the second part, “Darkness was the cause ___ his losing his way,” the preposition "of" is correct because it is used to denote the relationship between a cause and its effect. Saying “the cause of his losing his way” highlights that darkness is the reason or factor that led to him getting lost. The preposition "of" effectively connects the idea of a cause with its resultant effect.

Overall, "for" and "of" fit the contextual meaning necessary for these expressions, cementing choice A as the correct selection.