Consider the following characteristics:

1). Small interference 2). Strong tooth 3). Low production cost 4). Gear with small number of teeth Those characteristics which are applicable to Stub \(20^{\circ}\) involute system would include

(a) 1 alone

(b) 2,3 , and 4

(c) 1,2 , and 3

(d) \(1,2,3\), and 4 .