The yield strength and ultimate strength of M20 bolts are
20 N/mm2 and 28 N/mm2
200 N/mm2 and 280 N/mm2
200 N/mm2 and 400 N/mm2
240 N/mm2 and 400 N/mm2
(D) 240 N/mm2 and 400 N/mm2
Explanation: