Which sentence is correct?... | English Class 2

Name: CREST Olympiads
Address: Office No. 234, Spaze iTech Park, Tower-B2, 2nd Floor, Sohna - Gurgaon Rd, Sector 49, Gurgaon, 122018, IN
Telephone: 9818294134

English Class 2 Punctuation

Asked by GOURAB GHOSH · HEM SHEELA MODEL SCHOOL, DURGAPUR

Which sentence is correct?

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A May I come in?
B May i come in?
C May I come in.
D may I come in?