Which of the statement(s) given below is/are are correct?

Statement I is correct: nested if statements execute the inner condition only if the outer condition is true first—this is fundamental to control flow. Statement II is correct: if blocks execute their statements only when the condition evaluates to true; otherwise, they are skipped. Both statements accurately describe standard conditional execution behavior in programming.

Step-by-step Derivation:
Evaluation of each statement:

Statement I: Consider nested if statements:

if (outer_condition) {
    if (inner_condition) {
        // code
    }
}

The inner if is only reached (and thus executed) if outer_condition is true. This statement is TRUE.

Statement II: The if construct in all programming languages follows this rule:

if (condition) {
    // These statements execute only if condition == true
}

If condition is false, the block is skipped. This statement is TRUE.

Since both statements I and II are correct, the answer is D.