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.
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.