Correct option A
Most important is to know, what makes idiom correct !
Small small word, which we call Preposition, which some ignore and end up in worng answer selection
with proper knowledge, this hard question can be solved in just 30 sec
Rule 1 : Preposition follow only Noun, Pronoun and Gerund
Rule 2: Understand the usage of some helpful preposition like "to", "for", "of", "in" which are used almost max time in GMAT
Rule 3: Verb-ing and Gerund are different
Preposition
"to" when indicating that there is movement from one place to another.
Preposition
"for" to talk about a purpose or a reason for something
Preposition
"of" when we want to show that people or things relate to other things or peopler
Preposition
"In" is defined as inside an area, moving from a point outside to a point inside
Eliminate D, and E - wrong usage of Preposition "to" with verb "heal"
- Idiom Error Either X or Y
- Parallelism Error - asking not parallel to thank
(D)
to heal physical and mental ills or
to thank her for such help
(E)
to heal physical and mental ills or thanking her for such help
Eliminate B, and C Parallelsim error - asking || thanking,
Preposition Error - For used for verb "helping"
Idiom Error - Either X or Y
(B) in healing physical and mental ills and
to thank her
for helping(C) in healing physical and mental ills, and thanking her
for helpingCorrect OptionA)
in healing physical and mental ills or thanking her for such help
- Healing is a Noun, correct usage of preposition "IN"
- Either X or Y - correct
- Parallelism asking || thanking