Table: anti - ship missile
Question: What is the most common propulsion type for anti-ship missiles launched from air and surface platforms?
Step 1 (Operation, Indexing): propulsion
Step 2 (Operation, Grouping): launched by equals to surface , air
Step 3 (Reasoning, Aggregating): COUNT, type of propulsion
Step 4 (Reasoning, Aggregating): MAX, count of propulsion
Answer: ramjet