The phrase "a combination of which" is grammatically correct and can be used in written English.
It is typically used to introduce a clause that provides additional information about a combination of elements previously mentioned. Example: The company offers a variety of products, a combination of which cater to different needs and preferences.
Barât, by comparison, wears a leather jacket and a black cowboy hat, a combination of which Neil Young might be proud.
On the growing number of incinerators, a spokesman for the Department for Environment, Food and Rural Affairs, said: "It is one among several waste technologies, a combination of which is needed for sustainable waste management.
The process involves dunking plants in a solution made out of luciferase, luciferin and coenzyme A (a combination of which creates fireflies' glow) and applying pressure that essentially forces the solution into plant pores.
The main objective this study is to be able to specify design parameters, a combination of which can extract maximum possible thermal and electrical energy out of the available solar energy.
The cross-section of the composite rods can be designed to enable deformation modes of bending and twisting, a combination of which can guide the 1D rod into almost any 3D shape.
It will be launched at ambient temperature and cooled down on orbit by mechanical coolers on board with an efficient radiative cooling system, a combination of which allows us to have a 3.5-m class cooled (4.5 K) telescope in space.
Gatecrasher was a crucible which picked and chose a combination of things which existed already and put them together.
A combination of microscopy, which provides spatial resolution, and spectroscopy, which provides molecular information, is necessary to probe protein NP cell interactions.
The group's name is a combination of lulz, which is slang for laughs, and sec, which stands for security.
The study benefited from the inclusion of a combination of trials which had ended at the time of the interviews, and those which were ongoing.
Not everyone seems to be affected by the bug, which implies that it could be associated only with certain iOS versions and/or a combination of settings which cause the crash to occur.
