Cost price of the article is RS. 500.

Selling price = 500 × 1.2 = Rs. 600

Checking with the OPTIONS:

Option A:

CP = 500 – 200 = 300

SP = 600 – 180 = 420

∴ Profit = [420 – 300]/300 = 40%

It does not satisfy the blanks.

Option B:

CP = 500 – 100 = 400

SP = 600 – 112 = 488

∴ Profit = [488 – 400]/400 = 22%

It does not satisfy the blanks.

Option C:

CP = 500 – 150 = 350

SP = 600 – 145 = 455

∴ Profit = [455 – 350]/350 = 30%

It satisfies the blanks.

Option D:

CP = 500 – 50 = 450

SP = 600 – 20 = 580

∴ Profit = [580 – 450]/450 = 28.8%

It does not satisfy the blanks.

∴ Option C satisfies the blanks.