neha.mail.verma wrote:I m stuck between B and D.
choice (d) uses "this" as a standalone pronoun. that's pretty much never acceptable in a formal written sentence.
if you're going to use "this", you should use it as an adjective: this thing, this finding, this statistic, etc.
also, here's some "extra credit" knowledge:
there ARE constructions that can stand for the abstract information in an entire clause (unlike pronouns, which are limited to standing for actual nouns). chief among these are the COMMA + NOUN modifiers.
however, the presence of "because" at the beginning of choice (d) would preclude the use of those modifiers as well.
here's an example:studies have shown that X is 60 percent of Y, a finding that has shocked most observers.studies have shown that X is 60 percent of Y; this finding has shocked most observers.
--> both correct. note that "a finding", following the comma, or "this finding", standing alone after the semicolon, stands for the entirety of the clause that comes before it; you couldn't use "which" here, because "which" would automatically refer to Y.because studies have shown that X is 60 percent of Y, this finding has shocked most observers.
--> incorrect. the presence of "because" at the beginning of the first clause means you can't use "this finding" anymore.
i don't have any idea what the actual rule is here, but i do know with 100% certainty that these constructions are allowed and disallowed respectively.