Sanskrit Krit Pratyay Exercises - Choose The Correct Option

Choose The Correct Option

'सुशाश्लङ्कनम्' is the combination of 'सु + श्लङ्क् + यङ्लुक् - श्लकिँ गतौ गत्यर्थः भ्वादिः' dhatu and which pratyaya ?