English grammar error-spotting (avoid double markers ‘‘supposing’’ + ‘‘if’’): Identify the single erroneous segment and correct it: ‘‘Supposing if / there is no bus. / how will you get there? / No error.’

Given data

• A uses two conditional markers back-to-back.

Concept / Approach
Use either ‘‘Suppose/Supposing’’ or ‘‘if’’, not both. Doubling is redundant and nonstandard in formal English.

Correction
‘‘Supposing there is no bus, how will you get there?’’ or ‘‘If there is no bus, how will you get there?’’

Common pitfalls

• Stacking conditional markers; the exam frequently tests this redundancy.

Final Answer
Supposing if