Female presents with history of color change from pallor to cyanosis on exposure to cold in fingers. This condition is mostly associated with?

A. i.e. Scleroderma Raynaud's phenomenon (i.e. cold/vibration/emotional stress-exposure Vt pallor --> cynosis & finally erythemaQ of digits, ear & tip of nose) is almost always present (along with skin sclerosis) and is often earliest featureQ of Systemic sclerosis (Scleroderm). It may precede extensive skin & internal organ involvement by week-months (in diffuse SS) to years (in limited cutaneous SS).