Stem Cell Statement Accuracy Steps:

• Identify the statements: Assume 1 is true (stem cells self-renew), 2 is true (they differentiate into multiple cell types), 3 is false (not all stem cells are pluripotent).
• Evaluate each: Statement 1 aligns with stem cell definition; statement 2 matches potency; statement 3 misrepresents totipotency.
• Match to options: 1 and 2 correct, so B; A includes false 3; C and D pair false with true.
• Confirm: B selects only verified statements.

Why B is correct:

• B identifies exactly the true statements (1 and 2) per stem cell biology definitions of self-renewal and differentiation.

Why the others are wrong:

• A includes false statement 3.
• C pairs true 1 with false 3.
• D pairs true 2 with false 3.

Final answer: B