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Que. Match the foIlowing control strategies of prolog :

  a. Forward movement i. variable can be done with a constant another variable or a function

  b. Unification ii. the entire conjunctive goal is executed

  c. deep back tracking  iii.    Previous sub goal to find alternative solutions

 d. Shallow backtracking  iv.   Chooses sub goal with possible   unifier

a b c d
a. iv  i   ii   iii
b. ii   iv   i   iii
c. iii i iv ii
d. ii iii iv i
Answer:ii   iv   i   iii
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