<prompt> Which investigation has been performed here to diagnose Edward syndrome?KaryotypeFISHMLPAMicroarray  <response>: - Fluorescent in situ hybridization FISH- molecular cytogenetic technique that uses fluorescent probes to test for the presence or absence of specific chromosome regions. - Trisomy 18 Edwards Syndrome Mnemonic--ROCKY MOUNTAIN Rocker bottom foot Overlapping fingers Cardiac defects Kidney malformations MicrocephalY Mental retardation Patau syndrome- Trisomy13 Down syndrome- Trisomy21 Turners syndrome- monosomy X0 