In which VS When ( Manhattan CONTRADICTS OG)

[1213982959]

In GMAT OG 13th Edition, Page 717
Question #35
Explanations for answer choice (D) says that the correct pronoun for time is when.

However, in the Manhattan SC guide, Page 87, it says that the pronoun when can be used to modify a noun event or time,...you can also use in which instead of when

Clearly, OG does not permit the use of in which for time, whereas Manhattan says it is INTERCHANGEABLE!

so... which one to believe???

[RonPurewal]

In GMAT OG 13th Edition, Page 717
Question #35
Explanations for answer choice (D) says that the correct pronoun for time is when.

However, in the Manhattan SC guide, Page 87, it says that the pronoun when can be used to modify a noun event or time,...you can also use in which instead of when

Clearly, OG does not permit the use of in which for time, whereas Manhattan says it is INTERCHANGEABLE!

so... which one to believe???

i wouldn't use "in which" after the noun time. but beware -- the prohibition on "in which" doesn't extend any further than that.

i.e., there are a whole host of time-related nouns that can perfectly well be used with "in which":
a period in which...
an era in which...
an epoch in which...
etc.

in fact, as long as you're flipping through the OG, flip ahead just a few pages to #72, and there you'll find a correct answer containing "an age in which..."
so, yeah.

by the way, the explanation for #35 is a bit out to lunch, anyway; it actually refers to "when" as a pronoun! "when" is definitely not a pronoun.)