Step 1: National Political Parties in India
As per the Election Commission of India, a national party is a party which secures at least 6% of the total votes in any four or more states and has at least 4 seats in the Lok Sabha.
Step 2: Current National Parties
Currently, India has five national political parties, which are:
1. Bharatiya Janata Party (BJP)
2. Indian National Congress (INC)
3. Communist Party of India (CPI)
4. Communist Party of India (Marxist) - CPI(M)
5. Nationalist Congress Party (NCP)
Step 3: Conclusion
Thus, the correct answer is option (B) Five.
$PQ$ is a chord of length $4\ \text{cm}$ of a circle of radius $2.5\ \text{cm}$. The tangents at $P$ and $Q$ intersect at a point $T$. Find the length of $TP$.