29. If pis any statement, t is a tautology and c is a contradiction then which of the following is not correct-

If p is any statement,t and c are a tautology and a contradiction respectively then which of the following is not correct- (a) p^^t=p(b)p^^c=c(c)p vv t=c(d)p vv c=p

Which of the following statement is a tautology

Which of the following statement is a tautology :

The dual of (p ^^ t) vv ( c ^^ ~ q) where t is a tautology and c is a contradiction, is

The dual of (p ^^ t) vv ( c ^^ ~ q) where t is a tautology and c is a contradiction, is

Which of the following statements is a tautology ?

Which of the following statements is a tautology ?