0.0007 + 0.07 + 0.007 + 0.7 = ?

Correct option is B

Given:
Expression: 0.0007 + 0.07 + 0.007 + 0.7
Solution:
Align the decimal values by adding trailing zeros where necessary for clarity:
0.7000 + 0.0700 + 0.0070 + 0.0007 = 0.7777
Final Answer
So the correct answer is (b)