B accepts A's proposal by a letter sent by post. The communication of the acceptance is complete.
A. As against B, when the letter is posted; as against A, when the letter is received by B
B. As against A, when the letter is received; as against B, when the letter is posted by A
C. As against A, when the letter is posted; as against B, when the letter is received by A
D. None of these
Answer: Option C

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