Step 1: Understand the RMNCAH+ colour-coding system.
Under the RMNCAH+A strategy, districts/blocks are tracked on key maternal and child health indicators and given a card colour. A GREEN card denotes acceptable/good performance, whereas a RED card flags poor performance that needs priority action.
Step 2: Interpret each indicator against its desirable direction.
For mortality indicators (IMR, MMR) a LOW value is GOOD, so <20% threshold being met = green. A lower TFR is also desirable, and a high TFR is bad - however the question frames the only indicator whose LOW value is undesirable as service coverage.
Step 3: Identify the undesirable low value.
For a service-utilisation/coverage indicator such as children receiving healthcare, a HIGH value is good and a LOW value is bad. If only <20% of children are receiving healthcare, coverage is grossly deficient - this is a poor-performance (RED) indicator.
Step 4: Why the others are GREEN.
IMR <20%, MMR <20% reflect low mortality (good). A low value being met is favourable for mortality indicators, hence green. Coverage falling below 20% is the lone deficiency.
Key fact: For coverage/utilisation indicators a low value (<20% children receiving healthcare) earns the RED card, while low mortality indicators earn green.