A cricket bat was

Given, cost price of cricket bat = 800 and

Selling price of cricket bat = 1600

Need to find out the profit earned

⇒ Profit = SP-CP

= 1600-800

= 800

⇒ We know that, Profit% = × 100%

= × 100%

= 100%

∴ profit earned is 100%

⇒ Option A is correct as 100 = 100

⇒ Option B is incorrect as 64 ≠ 100

⇒ Option C is incorrect as 50 ≠ 100

⇒ Option D is incorrect as 60 ≠ 100

Hence, Option A is correct one.