Step 1: e-NAM was launched in 2016, and has integrated about 1,361 mandis, both true.
Step 2: It serves about 1.8 crore farmers, also true.
Step 3: By elimination, the trading volume figure of Rs 4.5 lakh crore is overstated; actual figures are closer to Rs 2-3 lakh crore.
Correct option: Statement 4, the trading volume figure, is not true.