Step 1: Analyze the series

1, 4, 27, 16, 125, ?, 343...

Step 2: Identify the pattern

• Odd positions: 1, 27, 125, 343 → cubes (1³, 3³, 5³, 7³)
• Even positions: 4, 16, ? → squares (2², 4², 6²)

Step 3: Find the missing term

6² = 36

Answer: (B) 36