Question

STD refers to
(a) Suburban Telephone Dialing
(b) Subscriber Trunk Dialing
(c) Social Telephone Distributor
(d) Speed Telephone Dialing

Answer 1

Answer:

Std refers to b) Subscriber Trunk Dialing

hop it helps..!!

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Answer 2

Answer:

(b) Subscriber Truck Dialing

Explanation:

Hope it helps.....