(A) long range artillery
(B) ** submarine
(C) depth charge
(D) machine gun
EXPLANATIONS BELOW
Concept note-1: -torpedo, cigar-shaped, self-propelled underwater missile, launched from a submarine, surface vessel, or airplane and designed for exploding upon contact with the hulls of surface vessels and submarines.
Concept note-2: -The slide valve allows water from the ejection pump to enter the tube. When the launch command is given and all interlocks are satisfied, the water ram operates, thrusting a large volume of water into the tube at high pressure, which ejects the torpedo from the tube with considerable force.
Concept note-3: -They can be of three types i.e. guided weapons, non-guided weapons and rocket and mortar weapons. Guided weapon is a torpedo, which is very powerful and most commonly used thus the focus here will be on the mighty torpedo. Non-guided weapons are mines and depth charges.
Concept note-4: -The MK 48 Mod 7 CBASS torpedo is the U.S. Navy’s most capable and potent anti-surface and anti-submarine weapon in use aboard U.S. Navy and allied submarines today and has been designed to be exceedingly lethal and effective against threats operating in deep and shallow waters.
Concept note-5: -The Nordenfelt-class Ottoman submarine Abdül Hamid (1886) was the first submarine in history to fire a torpedo while submerged.