Microprocessors - Engineering

Q1:

Consider the following rules about integer constant in C
  1. An integer constant must have at least one digit.
  2. An integer constant must not have a decimal point.
  3. An integer constant may be positive or negative.
  4. The default sign is positive.
  5. A maximum of one comma or blank is allowed.
Which of the above are correct?

A All

B 1, 2, 3, 4 only

C 1, 2, 3, 5

D 2, 3, 4, 5 only

ANS:B - 1, 2, 3, 4 only

No comma or blank is allowed in integer constant in C.