Q15·Section I (General (compulsory))·15 of 84A closed disc is convexThe set B={(x1,x2):x12+x22≤4}B=\{(x_1,x_2):x_1^2+x_2^2\le4\}B={(x1,x2):x12+x22≤4} is a: OptionsAconvex setBconcave setCunbounded setDconcave and convex setPick an option to check your answer.Show answerShow solution Report a problem with this question← Q14All questionsQ16 →Keyboard: A–D answer · S solution · ←/→ previous/next