Find the missing number from the given alternatives.

28

The correct answer is Option (1) → 28

Step 1: Observe the pattern

Check row-wise ratios or differences:

• Row 1: 6 → 10 → 14 (difference +4 each)
• Row 2: 9 → 15 → 21 (difference +6 each)
• Row 3: 12 → 20 → ? (difference seems increasing; likely +8 each)

Step 2: Calculate missing number

$12 + 8 = 20 \quad (\text{already given}) 20 + 8 = 28$