Deep sea sponges have silicate spicules because: 

(a) precipitation of calcium carbonate is hindered by the depth. 

(b) at greater depth sequestration of silica is easier. 

(c) only silicious spicules make circulation of water through body efficient. 

(d) availability of calcium is relatively less at depth.

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  void foo(int x, int y)
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  y+=x;
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  }
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  (B) 5 and 12
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  (D) 12 and 20
  
  

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• What is the number of steps required to derive the string ((() ()) ())

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