Which of the following are legal statements in 𝐶 programming language? (a)…

Explanation: Determine whether each declaration is legal in C.

• int *P = &44; — Illegal: you cannot take the address of an integer literal like 44. The & operator requires an lvalue (a named variable or object).

• int *P = &r; — Legal if r is declared as int: &r has type int* which matches P's type.

• int P = &a; — Illegal: &a has type int* (pointer), which cannot be assigned to an int without an explicit cast; the types are incompatible.

• int P = a; — Legal if a is declared as int: this copies the integer value of a into P.

Conclusion: The legal declarations are int *P = &r; and int P = a; (assuming r and a are variables of type int).