Explanation:

- The given series with blanks is: _ SSRS _ _ SS _ S _

- We need to fill in these blanks with a consistent pattern using the options provided.

- Option 1: RRRSR

- Filling in: R SSRS R R SS R S R

- Results in: RSSR SRR SSR SR (doesn't form a recognizable or repeating pattern)

- Option 2: RSRRS

- Filling in: R SSRS R S SS R S R

- Results in: RSSR SRSS RS (appears random and does not maintain a specific pattern)

- Option 3: SRRSR

- Filling in: S SSRS R S SS R S R

- Results in: SSR SSR SS R (pattern SSRSS repeats effectively)

- Option 4: RSSRR

- Filling in: R SSRS S R SS R S R

- Results in: RSSR SSR S (pattern breaks with no consistency)

Correct Answer:

- Option 3: SRRSR completes the sequence with a recognizable pattern: SSRSSR.