Step 1: Read the question carefully - it asks which statement is NOT correct about the WHO MR (Measles-Rubella) vaccination campaign. So we must spot the one wrong claim.
Step 2: India is a founding participant of this South-East Asia Region resolution to eliminate measles and control rubella/CRS by the year 2020. India rolled out the MR campaign nationally; therefore claiming India has not launched it is factually incorrect.
Step 3: The eligible age band of $9$ months up to less than $15$ years (option a) is accurate, and the rationale of preventing CRS-related irreversible birth defects (option b) is the very reason rubella was added.
Step 4: Post-campaign, MR replaces the older measles-only schedule and enters routine immunization (option d) - also correct.
Step 5: The only false statement is option c.
\[\boxed{\text{India has not yet launched this campaign}}\]