Match List-I with List-II and select the correct answer using the code given below the lists: List-I A. Explanation of the photoelectric effect B. Discovery of a comet C. Measurement of the electronic charge D. Thermoelectricity List-II 1. J.J. Thomson 2. Robert Millikan 3. Einstein 4. Edmund Hailey 5. Seebeck Codes: A B C D

The matching of scientists to their discoveries is as follows: (A) Albert Einstein provided the groundbreaking explanation of the photoelectric effect in 1905 by proposing that light consists of discrete particles called photons [t3, t7]. For this work, he was awarded the Nobel Prize in 1921 [t5]. (B) Edmund Halley (often spelled Hailey in older texts) is famously known for the discovery and orbital calculation of the comet that bears his name [t1]. (C) Robert Millikan is credited with the precise measurement of the electronic charge through his famous oil-drop experiment in 1909 [t2]. (D) Thomas Johann Seebeck discovered thermoelectricity in 1821, observing that a thermal gradient between dissimilar conductors produces electricity, a phenomenon now known as the Seebeck effect [t4]. J.J. Thomson, while listed, is primarily associated with the discovery of the electron and its charge-to-mass ratio rather than the specific items in the primary list [t2, t9].