Spot the error in the sentence; select ‘‘No error’’ if none. Sentence: Naren could not decide as to which course he should do after obtaining his Degree.

Introduction / Context:
This item probes idiomatic verb–object collocation. We normally ‘‘take’’ or ‘‘pursue’’ a course; we do not ‘‘do’’ a course in formal English.

Given Data / Assumptions:

• Main verb choice at issue: ‘‘do’’ with ‘‘course.’’
• Decision context: choosing a course after graduation.

Concept / Approach:
Use verbs that collocate with ‘‘course’’ in academic English: ‘‘take a course,’’ ‘‘pursue a course,’’ ‘‘enrol on a course’’ (BrE) or ‘‘enroll in a course’’ (AmE). Therefore the phrase should be ‘‘which course he should take.’’

Step-by-Step Solution:
Identify non-idiomatic collocation: ‘‘do a course.’’Replace with idiomatic verb: ‘‘take’’ or ‘‘pursue.’’Correct version: ‘‘… decide which course he should take after obtaining his degree.’’

Verification / Alternative check:
Search your own usage: we say ‘‘I am taking a course in …’’ rather than ‘‘I am doing a course’’ in formal contexts.

Why Other Options Are Wrong:
A, B, and D are acceptable (‘‘as to’’ is a bit wordy but not wrong); C is the clear collocation error.

Common Pitfalls:
Transferring informal or regional phrases (‘‘do a course’’) into standard written English; capitalizing common nouns like ‘‘degree’’—better lower-case unless part of a proper name.

Final Answer:
course he should do