Step 1: Work backwards from the year:
A 150th anniversary in 2025 means birth year 1875.
Step 2: Add 150 to each birth year:
Patel: 1875 + 150 = 2025. Bose: 1897 + 150 = 2047. Gandhi: 1869 + 150 = 2019. Shastri: 1904 + 150 = 2054.
Step 3: Look for 2025:
Only Patel's total is 2025. Gandhi's is 2019 (already celebrated), and the other two are in the future.
Step 4: Answer:
So the leader is Sardar Vallabhbhai Patel, option 1.
Final Answer:
Only Sardar Patel, born in 1875, has his 150th anniversary in 2025.
\[ \boxed{\text{1 (Sardar Vallabhbhai Patel)}} \]