Step 1: Identify the coding rule

• Z = 26 in alphabetical order → 26 × 2 = 52
• ACT → A=1, C=3, T=20
• (1 × 2) + (3 × 2) + (20 × 2) = 2 + 6 + 40 = 48

Rule: Each letter’s position × 2, then sum.

Step 2: Apply to RAT

• R = 18 → 18 × 2 = 36
• A = 1 → 1 × 2 = 2
• T = 20 → 20 × 2 = 40

Total = 36 + 2 + 40 = 78

Answer: (B) 78