Stern formula to determine I.Q is:

Stern formula to determine I.Q is: (a) M.A × C.A × 100 (b) M.A + C.A × 100 (c) M.A / C.A × 100 (d) C.A / M.A × 100 ✅ Correct Option: (c) M.A / C.A × 100 Explanation: The Stern formula calculates IQ by dividing Mental Age (MA) by Chronological Age (CA) and multiplying by 100. This formula standardized intelligence measurement. 10 PPSC-Relevant Facts: 1. Proposed by William Stern 2. IQ formula based on age 3. MA = Mental Age 4. CA = Chronological Age 5. Multiply by 100 6. Standard IQ = 100 7. Used in psychology 8. Intelligence testing 9. Educational assessments 10. Very important PPSC MCQ